diff --git a/framework/src/Volo.Abp.EventBus.Abstractions/Volo/Abp/Domain/Entities/Events/Distributed/EtoBase.cs b/framework/src/Volo.Abp.EventBus.Abstractions/Volo/Abp/Domain/Entities/Events/Distributed/EtoBase.cs
index f574240dc8..c877dccc58 100644
--- a/framework/src/Volo.Abp.EventBus.Abstractions/Volo/Abp/Domain/Entities/Events/Distributed/EtoBase.cs
+++ b/framework/src/Volo.Abp.EventBus.Abstractions/Volo/Abp/Domain/Entities/Events/Distributed/EtoBase.cs
@@ -6,11 +6,11 @@ namespace Volo.Abp.Domain.Entities.Events.Distributed
     [Serializable]
     public abstract class EtoBase
     {
-        public Dictionary<string, object> Properties { get; }
+        public Dictionary<string, string> Properties { get; set; }
 
         protected EtoBase()
         {
-            Properties = new Dictionary<string, object>();
+            Properties = new Dictionary<string, string>();
         }
     }
 }
\ No newline at end of file
diff --git a/framework/test/Volo.Abp.Json.Tests/Volo/Abp/Json/AbpHybridJsonSerializer_Tests.cs b/framework/test/Volo.Abp.Json.Tests/Volo/Abp/Json/AbpHybridJsonSerializer_Tests.cs
index eb44e51820..f719eb68f8 100644
--- a/framework/test/Volo.Abp.Json.Tests/Volo/Abp/Json/AbpHybridJsonSerializer_Tests.cs
+++ b/framework/test/Volo.Abp.Json.Tests/Volo/Abp/Json/AbpHybridJsonSerializer_Tests.cs
@@ -63,6 +63,23 @@ namespace Volo.Abp.Json
 
             json.ShouldContain("SystemTextJson");
         }
+        
+        [Fact]
+        public void SystemTextJsonSerialize_With_Dictionary_Test()
+        {
+            var json = _jsonSerializer.Serialize(new MyClassWithDictionary
+            {
+                Properties =
+                {
+                    {"A", "AV"},
+                    {"B", "BV"}
+                }
+            });
+
+            var deserialized = _jsonSerializer.Deserialize<MyClassWithDictionary>(json);
+            deserialized.Properties.ShouldContain(p => p.Key == "A" && p.Value == "AV");
+            deserialized.Properties.ShouldContain(p => p.Key == "B" && p.Value == "BV");
+        }
 
         public class MyClass1
         {
@@ -83,6 +100,16 @@ namespace Volo.Abp.Json
             public string Provider { get; set; }
         }
 
+        public class MyClassWithDictionary
+        {
+            public Dictionary<string, string> Properties { get; set; }
+
+            public MyClassWithDictionary()
+            {
+                Properties = new Dictionary<string, string>();
+            }
+        }
+
         class NewtonsoftJsonConverter : JsonConverter<MyClass1>, ITransientDependency
         {
             public override void WriteJson(JsonWriter writer, MyClass1 value, JsonSerializer serializer)